Flat-bed printing press



1. Mumia. FLAT BED PRINTING PRESS. APPLICATION FILED-IAN. 8. IQZI.1,409,7 43. Patented Mar. 14,1922.

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UNITED STATES PATENT OFFICE.

JOHN WILLIAM LITTLER, OF BROADHEATH, ENGLAND, ASSIGNOR TO LINOTYIE ANDMACHINERY LIMITED, OF LONDON7 ENGLAND.

FLAT-BED PRINTING PRESS.

Specification of Letters Patent.

Patented Mar. 14, 1922.

Application filed January 8, 1921. Serial No. 435,789.

To all whom it may concern y Be it known that I, Jol-1N lViLLrAMLrrrLnn, a subject of the King of the United Kingdom of Great Britainand Ireland, and residing at Linotype and B'Iachinery IVOrkS,Broadheath, in the county of Chester, England, have invented new anduseful Improvements 'in Flat-Bed Printing Presses, of which thefollowing is a specification.

This invention relates to flat bed printing presses, and has for itsobject to provide an improved construction of the known type in whichthe bearers in such presses fulfil the dual capacity of bearers and sidebars so as to dispense entirely with the separate side bars which' aregenerally employed and to a corresponding extent serve for increasingthe space available for receiving the form.

The invention will now be described by reference to the accompanyingdrawings, in which Figure 1 is a plan, partly broken away, of a type bedfitted with the improved bearers and cross-bars;

Figure 2 is a Vfront elevation of the arrangement shown-in Figure l, and

Figure 3 'is a section on the line 3 3 of Figure l, drawn to a. largerscale than that figure.

According to the present invention, the cylinder bearers 2, 3 secured tothe type bed l are provided with recesses et, 5 respectively to enablethem to serve as side bars for the locking up ofthe' form. The recesses4, 5 are formed, as shown best in Figure B, with inwardly facing mouths,so that the tops or tracks of the bearers 2, 3, present the usualuninterrupted surfaces and also prevent the cross-bars 6, 7, fromworking out upwardly. The ends of the cross-bars 6, 7, are bevelled asshown to .permit of their readily enteringvthe recesses 4, 5, .when thebars are moved longitudinally, and the recesses in one of the bearers,say the recesses 5 in the so-called gear side bearer 3, are deeper thanare the corresponding recesses l in the opposite or feeder side bearer2, to allow of the just-named longitudinal movement for thedisengagement of the respective cross-bar first from one and then fromthe other of the two recesses with which it is vengaged and reverselyfor the engagement of the said bar therewith. In the exampleillustrated, the rear cross-bar 7, being wider than the recesses 4, 5,engages the latter by projections at its ends, the projection on the endadjacent to the deeper recess 5 being longer than that at the oppositeend, to permitgof the endwise engaging and disengaging movement of thesaid bar.

For the purpose of securing the crossbars 6, 7 in position for lockingup a form, each has pivoted to it, as by a shouldered screw 9, a catchorstop 8 in such a position that it may be engaged with the respectivebearer as shown 'in the drawing in full lines to prevent endwisemovement of the respective cross-bar, or turned on its pivot to theposition in which it is shown in dot-and-dash lines in Figure 2te permitthe removal of the bar. The inner ends of the catches 8 may beconveniently provided with tails bevelled as shown in Figures 2 and 3 tolimit their pivotal movement when the cross-bars 6, 'T are in positionon the type bed l.

The cross-bar 6 at the front edge of the type bed l is preferablyprovided on one of its edges with inclined surfaces 1l which, when thebar is used-in the position illustrated in Figure l, that is to say withthe said inclined surfaces presented towards the cross-bar '7, serve aswedge surfaces for locking up the form when the klocking-up furnitureused consists of wooden wedges, or quoins. IVhere, however, expansiblemetal vquoins are employed for locking up the form, such wedge surfacesare not required and the bar 6 may then be reversed end for end so as topresent its straight edge inwards. In order that the cross-baro may belocked when in the lastnamed reversed position a tapped hole 10 may beprovided in a convenient position on the appropriate inclined vsurfaceIl so that the catch 8 may be readily attached to that edge of the barAwhen required.

It is to be understoodvthat the precise construction herein describedand illustrated in the accompanying drawings is given merely as anexample, and may be varied within the scope of the invention.

I-Iaving described my invention, I declare that what I claim and desireto secure by Letters Patent is l. In a flat bed printing press, thecombination with the bed of cylinder bearers provided with recessesadapted to accom-- modate the ends of cross-bars for locking up theforni with a. capacity for endWise movement of the crossbars in suchrecesses.

2. In a fiat bed printing press, the combination With the bed and acylinder bearer on each side thereof, of oppositely-located recesses inthe respective bearers, cross-bars adapted to engage said recesses Witha capacity for endivise movement in the latter, and means adapted tolock said cross-bars against endvvise-movement when so engaged.

3. In a flat bed printing press, the combination With the bed and acylinder bearer on each side thereof, of a series of recesses in one ofthe bearers, a corresponding series of deeper recesses in the otherbearer, and cross-bars adapted to be engaged with and disengaged fromoppositely-located pairs of Ysuch recesses by endvvise movementrelatively thereto.

4C. In a flat bed printing press, the combination with the bed and acylinder bearer on each side thereof, of a series of recesses in one ofthe bearers, a corresponding series of deeper recesses in the otherbearer, crossbars adapted to be engaged with and disengaged fromoppositely-located pairs of such recesses by endwise movementYrelatively thereto and means adapted to lock said cross-bars againstendWise movement when so engaged.

5. In a fiat bed printing press, the combination With the bed and acylinder bearer on each side thereof forming an uninterrupted track forthe cylinder, of oppositely-located inwardly-opening recesses in therespective bearers, and cross-bars adapted to engage said recesses witha capacity for endwise movement in the latter.

6. In a flat bed printing` press, the combination with the bed and acylinder bearer on each sidey thereof forming an uninterrupted traclrfor the cylinder, Vof a series of inwardly-opening recesses in one ofthe bearers, a Correspending` series of deeper in- Wardly-openingrecesses in the otherbearer, and cross-bars adapted to be engaged Withand disengaged from oppositely-located pairs of such recesses by endwisemovement relatively thereto.

7. In a flat bed printing press, the combination With the bed and acylinder bearer on each side thereof forming an uninterrupted track forthe cylinder, of a series of inwardly-opening recesses in one of thebearers, a corresponding series of deeper inwardly-opening recesses inthe other bearer, cross-bars adapted to be engaged with and disengagedfrom oppositely-located pairs of such recesses by endwise movementrelatively thereto, and means adapted to lock said cross-bars againstendwise movement when so engaged.

8. In a flat bed printing press, the combination With the bed and acylinder bearer on each side thereof, forming an uninterrupted track forthe cylinder, of oppositelylocated inwardly-opening recesses in therespective bearers, cross-bars adapted to engage said recesses With acapacity for end- Wise movement in the latter, and means adapted to locksaid cross-bars against end- Wise movement when so engaged.

9. In a fiat bed printing press, the combination With the bed and acylinder bearer on each side thereof, of oppositely-located recesses inthe respective bearers, cross-bars adapted to engage said recesses, anda pivoted catch on each cross-bar adapted to engage With a` bearer toprevent endWise movement of the respective bar When so engaged.

l0. In a fiat bed printing press, the combination With the bed and acylinder bearer on each side thereof, of a series of recesses in one ofthe bearers, a corrresponding series of deeper recesses. in the otherbearer, crossbars adapted to be engaged With and disengaged fromoppositely-located pairs of such recesses by endWise movement relativelythereto, and a pivoted catch on each crossbar adapted to engage With abearer to pre vent endvvise movement of the respective bar When soengaged.

Il. In a flat bed printing press, the combination with the bed and acylinder bearer on each side thereof, forming an uninterrupted track forthe cylinder, of a series of inwardly-opening recesses in one of thebearers, a corresponding series of deeper inwardly-opening recesses inthe other bearer, cross-bars adapted to be engaged with and disengagedfrom oppositely-located pairs of such `recesses byk endvvise movementrelatively thereto, and a pivoted catch on each cross-bar adapted toengage Witha bearer to prevent endwise movement of the respective barwhen so engaged.VV

l2. In a Hat bed printing press, the combination with the bed and acylinder-.bearer on each side thereof' forming annninter rupted trackfor the cylinder, of oppositely-V located inwardly-opening recesses inthe respective bearers, cross-bars adapted to en gage said recesses, anda pivoted catch on each cross-bar adatped to engage with a bearer toprevent endwise movement of the respective bar when so engaged.

13. In a fiat bed printing press, the combination Witha bed and acylinder bearer on each-side thereof, of oppositely-located recesses inthe respective bearers, a cross-bar adapted to engage said recesses andhaving inclined surfaceson one edge and a fiat surface on the other, apivoted catch on the cross-bar adapted to engage with a bearer toprevent endwise movement of the bar when the latter is engaged With therecesses, and means adapted to secure the pivoted catch to either edgeof the cross-bar for the purpose specified.

le. In a fiat hed printing` press, the combination with the hed and acylinder bearer on each side thereof, of a series of recesses in one ofthe bearers, a corresponding series of deeper recesses in the otherbearer, a cross-bar having inclined surfaces on one edge and a latsurface on the other and adapted to be engaged Wit-h and disengagedYfrom oppositely-loeated pairs of said recesses by endivise movementrelatively thereto, a pivoted catch on the cross-har adapted to engagewith a bearer to prevent such movement of the bar when the latter isengaged With the recesses, and means adapted to secure the pivoted catchto either edge of the cross-bar for the purpose specified.

l5. In a fiat bed printing prese the coinbination with the bed and acylinder bearer on each side thereof, forming an uninterrupted track forthe cylinder, of a series of inwardly-opening recesses in one of thebearers, a corresponding series of deeper inwardly-opening recesses inthe other bearer, a cross-bar having inclined surfaces on one edge and aflat surface on the other and adapted to be engaged with and disengagedfrom oppositely-located pairs of said recesses by endwise movementrelatively thereto, a pivoted catch on the cross-bar adapted to engagewith a bearer to prevent such movement of the bar when the later isengaged with the recesses, and means adapted to secure the pivoted catchto either edge of the cross-bar for the purpose specified.

In testimony whereof I have aixed my signature hereto.

JOHN WILLIAM LITTLER.

